From OMIMAdams-Oliver syndrome (AOS) is a rare developmental disorder defined by the combination of aplasia cutis congenita of the scalp vertex and terminal transverse limb defects (e.g., amputations, syndactyly, brachydactyly, or oligodactyly). In addition, vascular anomalies such as cutis marmorata telangiectatica congenita, pulmonary hypertension, portal hypertension, and retinal hypervascularization are recurrently seen. Congenital heart defects have been estimated to be present in 20% of AOS patients; reported malformations include ventricular septal defects, anomalies of the great arteries and their valves, and tetralogy of Fallot (summary by Stittrich et al., 2014).
Genetic Heterogeneity of Adams-Oliver Syndrome
Other autosomal dominant forms of Adams-Oliver syndrome include AOS3 (614814), caused by mutation in the RBPJ gene (147183) on chromosome 4p15; AOS5 (616028), caused by mutation in the NOTCH1 gene (190198) on chromosome 9q34; and AOS6 (616589), caused by mutation in the DLL4 gene (605185) on chromosome 15q15.1.
Autosomal recessive forms of Adams-Oliver syndrome include AOS2 (614219), caused by mutation in the DOCK6 gene (614194) on chromosome 19p13, and AOS4 (615297), caused by mutation in the EOGT gene (614789) on chromosome 3p14.
http://www.omim.org/entry/100300 From MedlinePlus GeneticsAdams-Oliver syndrome is a rare condition that is present at birth. The primary features are an abnormality in skin development (called aplasia cutis congenita) and malformations of the limbs. A variety of other features can occur in people with Adams-Oliver syndrome.
Most people with Adams-Oliver syndrome have aplasia cutis congenita, a condition characterized by localized areas of missing skin typically occurring on the top of the head (the skull vertex). In some cases, the bone under the skin is also underdeveloped. Individuals with this condition commonly have scarring and an absence of hair growth in the affected area.
Abnormalities of the hands and feet are also common in people with Adams-Oliver syndrome. These most often involve the fingers and toes and can include abnormal nails, fingers or toes that are fused together (syndactyly), and abnormally short or missing fingers or toes (brachydactyly or oligodactyly). In some cases, other bones in the hands, feet, or lower limbs are malformed or missing.
Some affected infants have a condition called cutis marmorata telangiectatica congenita. This disorder of the blood vessels causes a reddish or purplish net-like pattern on the skin. In addition, people with Adams-Oliver syndrome can develop high blood pressure in the blood vessels between the heart and the lungs (pulmonary hypertension), which can be life-threatening. Other blood vessel problems and heart defects can occur in affected individuals.
In some cases, people with Adams-Oliver syndrome have neurological problems, such as developmental delay, learning disabilities, or abnormalities in the structure of the brain.
https://medlineplus.gov/genetics/condition/adams-oliver-syndrome